I didn't see the plan but it was prompting me to opt for extra 2'' legroom seats (which they have on the 757 and not the 737) and also extra space seats which don't get prompted on the 738 services. It is also the only in-bound turn with 1hour 15mins on the ground which they allocate to larger aircraft. All the 737 and 320 flights have turns of 60 mins.